Dust-guard.



No. 774,653. v PATENTED NOV. 8,1904. RDENBGRB. I

DUST GUARD.

APPLICATION FILED APR. 14, 1904.

N0 MODEL.

A 5M 6 i ii ni a; w: a

UNTTED STATES Patented November 8, 1904.

PATENT OFFICE.

IDIVARD DENEGRE, OF CHICAGO, ILLINOIS, ASSIGN OR TO MoCORD & COM- PANY, OF CHICAGO, ILLINOIS, A CORPORATION OF NEWV JERSEY.

DUST-GUARD.

SPECIFICATION forming part of Letters Patent No. 774,653, dated November 8, 1904. Application filed April 14, 1904. Serial No. 203,140. (No modelfi Z'n {ZZZ whom it may concern:

Be it known that I, EDWARD DENEGRE, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illi- 5 nois, have invented certain new and useful Improvements in Dust-Guards; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it ap- 1O pertains to make and use the same.

My invention has for its object to provide an improved dust-guard for car-axle journalboxes; and to this end the invention consists of the novel devices and combinations of de- 1 5 vices hereinafter described, and defined in the claims.

The invention is illustrated in the accompanying drawings, wherein like notations refer to like parts throughout the several views.

In said drawings, Figure l is aview in vertical longitudinal section on the line m of Fig. 2 with some parts removed and others broken away, illustrating my improved guard in working position. Fig. 2 is a vertical crosssection on the line 00 00 of Fig. 1. Fig. 3 is a vertical longitudinal section on the line m m of Fig. 2 or in a plane at right angles to Fig. 1 with some parts broken away. Fig. 4 is aview in vertical longitudinal section in the same plane as Fig. l, but showing the elements of the dust-guard separated from the end of the box and pulled apart from each other. Fig. 5 is a view in end elevation, showing the sectional packing-ring detached; and Fig. 6 is a detail in section on the irregular line in 50 of Fig. 3.

The reference-letters 6b, (0, and (firepresent the axle, the part (Z being the body portion, the part the journal, and the part a the intermediate portion subject to the dust-guard. The box Z) may be of the ordinary or any suitable construction and is provided with a raised boss 5, surrounding the axle-passage at the rear end of the box, and which boss 5 is machined or planed on its face and serves as the box-surface to be packed by the ring. Said box Z is also provided with lock-flanges on the sides of its rear end. i

The reference-letters b and Z) represent, respectively, the brass and the key. applied in the usual way.

I employ in this instance for the sectional packing-ringfan outer guard-plate 0, engageable with the box, and an inner guard-plate (Z, through which the pressure is'applied to the packing-ring f. The outer or main guardplate 0 is solid or of integral form and is provided with hook-like lateral projections or carlugs 0, adapted-to engage with the lock-flanges b of the boX. The said projections 0 are provided with pockets 0 serving as the seats for half-elliptic springs e. The inner guard-plate (Z is also solid or of integral form and is provided with lateral projections (Z', against which bear the. crowns of the springs 6 when the 6 parts are in working position. The packingring f, as shown, is composed of three sections provided with lap-jointsf and is preferably composed of gray iron, but may of course be composed of any other suitable ma- 7 terial. .The outer guard-plate c, the inner guard-plate (Z, and the packing-ring f are of the shape in cross-section best shown in Fig.

4. The inner packing-ring (Z has an inclined or beveled surface (Z and the packing-ring f has a corresponding inclined'or beveled surf for cooperation with said beveled surface (Z of the inner packing-ring (Z. The hub portion of the packing-ring-f fits the hub portion 'of the inner guard-plate (Z, and the hub portion of the inner guard-plate (Z fits the hub portion of the outer or main guard-plate c, the latter being of the proper shape and size to receive the hub of the inner guard-plate (Z and embrace with its peripheral flange the 5 radial flange or expanded portions of both the inner guard-plate (Z and the packing-ring f when the parts are in working position. The half-elliptic springs c react between the outer or main guard-plate c and the inner 9 guard-plate (Z, with the crowns of the springs bearing against the lateral or ear lugs (Z of r the latter, as hitherto noted and as best shown in Figs. 3 and 6. When the parts are applied in working position, the springs e become compressed by the act of making the hook-lugs c of the outer or main guard-plate l c engage the lock-flanges b of the box, and thereby become effective yieldingly to clamp the dust-guard to the box and in cooperation with the beveled surfaces (1 of the inner guard-plate (Z and f of the packing-ring 7" to hold the packing-ring tightly hugging both the box and the axle-surfaces packed thereby. Otherwise stated, the pressure from the springs 0 force the radial flange or expanded portion of the 1')ackingring tightly against the boss 7/ of the box and also, in virtue of the said beveled surfaces on the ring and on the inner guard-plate, serve to force the three sections of the packing-ring radially inward or toward each other, so as always to make the inner faces of the ringsections tightly to hug the axle-surface a packed thereby. Hence the joints of both the box and the axle packed by the ring will always be kept tight or dust-proof.

From the construction described it is equally obvious that when the dust-guard is in working position the packing-ring is free to move across the end of the box, as required for adaptation to the relative motions of the axle and the box incidental to the service. \Vhen the parts of the guard are in working position, the springs a will have been compressed to such tension that the weight of the dust guard will be taken on the box and the axle be thereby relieved from the wear and tear which would otherwise occur if the weight of the guard or any portions thereof were taken on the axle itself. It is equally obvious that with this construction none of the parts are exposed where they are liable to be tampered with, displaced, or lost.

By actual usage the efficiency of the dust guard above described has been demonstrated for the purposes had in view.

What .1 claim, and desire to secure by Letters Patent of the United States, is as follows:

1. The combination with a journal-box, of a sectional packing-ring adapted to pack both the box and the axle, an inner guard-plate applied to the packing-ring, an outer guardplate having means for engagement with the box, and springs reacting between the two guard-plates, and serving yieldingly to clamp the dust-guard to the box, and to force the packing-ring against both the box and the axle-surfaces packed thereby, substantially as described.

2. The combination with a journal-box, of the sectional packing-ring, having the beveled surface the inner guard-plate, having the beveled surface (Z and the lateral lugs (Z, and the outer guard-plate, having the hooklike ear-lugs 0 adapted to engage with lockflanges on the box, and the half-elliptic springs seated in the pockets 0 in the lugs c of the outer guard-plate and bearing against the lugs d of the inner guard-plate, when in working position, all for cooperation, substantiall y described.

In testimony whereof I aflix my signature in presence of two witnesses.

EDWVARD DENEGRE. Witnesses:

JAs. F. WV'iLLIAMsoN, F. D. MERCHANT. 

